-----I’ m not good at singing, you know.
----- . It's just for fun.
A. All right
B. No problem
C. Come on
D. Cheer up
网友回答
A. All right
B. No problem
(答案→)C. Come on
D. Cheer up
解析：考查交际用语：A. All right好的B. No problem没问题C. Come on加油D. Cheer up振作起来，句意：--你知道，我不擅长唱歌。--加油，这只是为了好玩。选C。